Integrated Saltwater Desalination and Energy Storage through a pH Neutral Aqueous Organic Redox Flow Battery
Integrated Saltwater Desalination and Energy Storage through a pH Neutral Aqueous Organic Redox Flow Battery
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DOI：
10.1002/adfm.202000385
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发表时间：
2020-04-27
影响因子：
19
通讯作者：
Liu, T. Leo
中科院分区：
文献类型：
--
作者：
Debruler, Camden;Wu, Wenda;Liu, T. Leo
本文报道了一种由三个电解质通道（即阳极电解液通道、阴极电解液通道和中央盐水通道）组成的 pH 中性水性有机氧化还原液流电池（AORFB），可实现综合储能和海水淡化。该海水淡化 AORFB 采用低成本、化学稳定的甲基紫罗碱 (MV) 阳极电解液和亚铁氰化钠阴极电解液，能够将模拟海水 (0.56 m NaCl) 淡化至 0.023 m 盐浓度，能源成本为 2.4 W h L-1 淡水，与当前的反渗透技术相当。同时，该电池以 79.7% 的效率提供存储能量，电池电压为 0.85 V。此外，该电池还能够以高达 15 mA cm(-2) 的更高电流运行，每小时提供 4.55 mL 淡水。将能量存储和海水淡化结合到这样一种双功能设备中，提供了通过一个硬件安装解决两个日益严重的全球问题的机会。
Here, a pH neutral aqueous organic redox flow battery (AORFB) consisting of three electrolytes channels (i.e., an anolyte channel, a catholyte channel, and a central salt water channel) to achieve integrated energy storage and desalination is reported. Employing a low cost, chemically stable methyl viologen (MV) anolyte, and sodium ferrocyanide catholyte, this desalination AORFB is capable of desalinating simulated seawater (0.56 m NaCl) down to 0.023 m salt concentration at an energy cost of 2.4 W h L-1 of fresh water-competitive with current reverse osmosis technologies. Simultaneously, the cell delivers stored energy at 79.7% efficiency with a cell voltage of 0.85 V. Furthermore, the cell is also capable of higher current operation up to 15 mA cm(-2), providing 4.55 mL of fresh water per hour. Combining energy storage and water desalination into such a bifunctional device offers the opportunity to address two growing global issues from one hardware installation.